US2873321A - Device for indication of a certain communication path and/or its electrical characteristics - Google Patents

Device for indication of a certain communication path and/or its electrical characteristics Download PDF

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Publication number
US2873321A
US2873321A US415092A US41509254A US2873321A US 2873321 A US2873321 A US 2873321A US 415092 A US415092 A US 415092A US 41509254 A US41509254 A US 41509254A US 2873321 A US2873321 A US 2873321A
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US
United States
Prior art keywords
electrical characteristics
indication
communication path
certain communication
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US415092A
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English (en)
Inventor
Dag V L Lindstrom
Axel G G Cronsten
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2873321A publication Critical patent/US2873321A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Surgical Instruments (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • ing And Chemical Polishing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
US415092A 1953-03-12 1954-03-09 Device for indication of a certain communication path and/or its electrical characteristics Expired - Lifetime US2873321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE336098X 1953-03-12

Publications (1)

Publication Number Publication Date
US2873321A true US2873321A (en) 1959-02-10

Family

ID=20308238

Family Applications (1)

Application Number Title Priority Date Filing Date
US415092A Expired - Lifetime US2873321A (en) 1953-03-12 1954-03-09 Device for indication of a certain communication path and/or its electrical characteristics

Country Status (5)

Country Link
US (1) US2873321A (en, 2012)
BE (1) BE527157A (en, 2012)
CH (1) CH336098A (en, 2012)
FR (1) FR1120056A (en, 2012)
GB (1) GB772735A (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274199B (de) * 1962-03-06 1968-08-01 Western Electric Co Schaltungsanordnung zur selbsttaetigen UEberwachung des Verbindungsaufbaus in einer Fernsprechvermittlungsanlage mit mehreren, ueber Fernleitungen miteinander in Reihe aufeinanderfolgend verbundenen Vermittlungsaemtern
US4901004A (en) * 1988-12-09 1990-02-13 King Fred N Apparatus and method for mapping the connectivity of communications systems with multiple communications paths

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159721A (en) * 1960-07-13 1964-12-01 Bell Telephone Labor Inc Outgoing trunk identification circuit
DE1153800B (de) * 1961-08-01 1963-09-05 Siemens Ag Schaltungsanordnung fuer Fernmeldevermittlungsanlagen, insbesondere Fernsprechwaehlanlagen, in denen Verbindungswege unter dem Einfluss von Markierern, Einstelleinrichtungen od. dgl. durchgeschaltet werden

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686840A (en) * 1950-11-25 1954-08-17 Int Standard Electric Corp Identification circuit for automatic or semiautomatic telephone systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686840A (en) * 1950-11-25 1954-08-17 Int Standard Electric Corp Identification circuit for automatic or semiautomatic telephone systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274199B (de) * 1962-03-06 1968-08-01 Western Electric Co Schaltungsanordnung zur selbsttaetigen UEberwachung des Verbindungsaufbaus in einer Fernsprechvermittlungsanlage mit mehreren, ueber Fernleitungen miteinander in Reihe aufeinanderfolgend verbundenen Vermittlungsaemtern
US4901004A (en) * 1988-12-09 1990-02-13 King Fred N Apparatus and method for mapping the connectivity of communications systems with multiple communications paths

Also Published As

Publication number Publication date
GB772735A (en) 1957-04-17
BE527157A (en, 2012)
FR1120056A (fr) 1956-06-29
CH336098A (de) 1959-02-15

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